Plate for ship-building.



APPLICATION FILEDJUNB 6, 1903.

N0 MODEL.

2 SHEETS-SHEET 1.

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PATENTED AUG. 25

J. CHAPMAN.

PLATE Fon SHIP-BUILDING.

APLIOATIO I'ILBD JUNE 6, 1903.

N0 MODEL.

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Iatented August 25, 1903.

y OFFiCE.

JOHN CHAPMAN, ou SUNDERLAND, ENGLAND.

`PLArr-z FoRsHiPf-BU-lLDlNG'.

sPEcIFcATIoN forming part of Letters patent Ne.u737,o78, dated August 25, 190s.

kApplication filed June 6,1903:I Serial No. 160,295. (No model.)

To all whom #may concern: v

Be it knownthatIgJOHN CHAPMAN, a sub- `iect of the King of Great Britainand Ireland, residing at and whose post-office address is 4 Oertonstreet, Millfleld, Sunderland, in the county of DurhamfEngland, haveinvented certain new and useful Improvements in Plates for Ship-Buildingand other Purposes,

' (for which I have applied for a patent in Great- Britain under No.14,212, dated .Iune23, 1902, and in Germany, filed September 2, 1902,)of

' which Athe following is a specification.

This invention relates to plates for use inship-building,bridgebuilding, theV construction of pontoons, gasometers,dock-gates, and other similar purposes; and it is directed to enablingsuch` classes of plating to be effected-without the necessity ofemploying packing at the so called landing and overlap butt edges, as isat present required, and, further, to dispense with the operation ofscarfing, whereby time, labor, and expense are reduced and the platingperformed in a more expeditious and convenient manner. To attain thisend, I ,joggle certain of the plates in a particularlnannerthat is tosay, I form theedges of thev plates Which are to be overlapped with afset at the point wherethe overlapping takesplace sufficient to bringthe plates, where hitherto tapered packing was required to"eft`ectclosure, in the same plane.

As the invention has been primarily devised for shipbuilding, I willdescribe the Way of carrying it out with respect to such service,reference being had tothe accompanying drawings, whereinv vFigure l is afront elevation, and Fig. 2 a plan, of four plates riveted together inaccordance with my invention. Figs. 3, 4, 5, and 6 are sections onthelines U U, V V, W W, and X X, respectively, in Fig. l. Fig. 7 is alperspective View of one of the joggled plates alone.

the mode of juggling where connection is to be made to the stem of thevessel or the like. Figs. 9 and l0 are sections on the lines Y Y and ZZ, respectively, in Fig. 8; and Fig. 1l is a perspective view of one ofthe joggled plates .shown in Fig.l S. Certain 'parts are Fig. 8 is anelevationshowing broken away in Figs. l and 8 for the sake of clearness.

Referring first to Figs. l to 7 of the said y drawings,T I fashion theoverlapping edge, or,

as it is sometimes termed, the overlapped edge, ctof each plate bof theinner strake, at the corners c c thereof, with a joggle, as

shown', sothat the corresponding corners d d with, and the landing-edgesff of the adjoin- 'ing outer strake-plates g g require no packing.Similarly at the point Where the overy lapping butt edges h h of theouter strakeplates meet the landing edgej of the inner straks-plate bthe latter is joggled for a suit-- able distance to allowof theoverlapped plate g of theV outer straketo be brought into the same planefor the purposes stated. Thus it will be seen the joggling is onlyrequired on the plates b b of the inner strake, those g g of the outerstrake being simply overlapped in'theusual way. This mode of'jogglingmay be appliedv to the edges of the plates where connection is to bemade to the stem, sternpost, or the like and enables scarti ng to bedispensed with, the plates at the-same time having the same thickness ofmaterial at these points and being consequently in no way4 weakened. Thelatter arrangement is illustrated in Figs. 8 to 1l, and it will be seenthat the inner strake-plate bis cut-away at the corners tok the extentof the breadth or'width of the stem 'lc or the equivalent part to whichit is to be attached and the, overlap of the outer Strake-plate gy-andthat the plate b is then joggled in the reverse manner or at rightangles to the direction of the joggle formerly described to allow of theplate g to be riveted thereto and to the stem without the necessity ofscarfing the plate b or providing packing.

What 'I claim as my invention, and desire Vto secure by Letters Patent,is-

1. 'In structures where metal` platesI are joined together a plateoverlapped ona plurality of its edges by otherplates, said overlappedplate being joggled at a pluralityl of its corners and ata plurality ofits edges so that each overlapping plate is flush with' the overlappedplate at points Where both the over- Ioo l lapped and overlapping platesare overlapped by a third plate.

2. In structures where metal plates are joined together, in combination,a plate joggled at a plurality of its corners, a plate overlapping saidplate and flush therewith at the joggled corners, said overlapping platebeing joggled at a plurality of its edges, a plate overlapping the twofirst-named plates and having a corner lying in one of the joggles ofthe second-named plate and flush therewith at that point.

3. In structures where metal plates are joined together, in combination,a plat-e joggled at a plurality of its corners, a plate overy lappingsaid plate and flush therewith at the corners, said overlapping platebeing joggled on one of its edges, a plate overlapping the twofirst-named plates and having a corner lying in the joggles of thesecond-named plate and Hush therewith at that point. v

4. In structures where a metal plate is joined to a stem or rib andoverlapped by another plate, in combination, a plate having a portion ofthe metal out away and joggled at two of its corners, the stem or riblying flush with the joggled portions of said plate and the plateoverlapping said stem or rib and joggled plate and lying flush thereon.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

J OI-IN CHAPMAN. Witnesses:

EDMUND W. PATTISON, HERBERT HOWARD.

